Re: [Chrysler300] 300H valve adjustment

["paul paulholm@xxxxxxxxxxxxx [Chrysler300]" <Chrysler300@xxxxxxxxxxxxxxx>]

> From: Chrysler300@xxxxxxxxxxxxxxx
> [mailto:Chrysler300@xxxxxxxxxxxxxxx] Sent: Friday, May 09, 2014
> 11:06 AM To: Listsaver 300 Club Cc: Gary Nelson Subject:
> [Chrysler300] 300H valve adjustment

> I have been working gradually towards getting my 300H running as
> well as I can.

> This forum has been a terrific help in many ways.

> A big step was the professional restoration/rebuild of both carbs,
> which followed the earlier massive and total restoration of the
> braking system, including installation of the correct double
> diaphragm booster. (Booster Dewey of Portland discovered that
> problem.)

> Recently, I had the distributor rebuilt which resolved my runaway
> idle adjust problem and is generally a great improvement.

> The next thing I am suspicious of is my valve settings.

> Unfortunately, the camshaft in the car is not the stock 300H
> camshaft, but instead is one which a well respected

> racing engine shop in Illinois installed in 1982 because of a fear
> that the engine would not be able to run on unleaded gasoline .
> (They were right in a way because a few years later I had to have
> hardened seats installed on the road.) It ostensibly lowers the
> compression ratio.

> The camshaft is a Barnes Racing Cams Design no 275 (I have the spec
> sheets for it) I do have a stock 300H camshaft which I eventually
> use to replace it, but not this summer.

> I had a well meaning friend stop by last year who was going to help
> me get it running right,. He managed to destroy all the old car
> linkages by bending them etc. and wanted to modify all sorts of
> things-in the process though, we got into a valve adjustment
> exercise one might and he was convinced the settings specified were
> wrong!

> So my next step is to set all the valve per the manufacturers
> specified valve lash.

> Chrysler 300H settings specified are .015 intake, .024 exh, set with
> engine running.

> Barnes F295 settings are .026 instake, .026 exh, set "hot"

> I have no idea what settings I have which is why I want to verify
> it. I suspect they may be stock 300H settings but the idle makes me
> think I have some hot valves.

> Question:

> I do not think I have ever set these valves hot with the engine
> running as specified in the shop manual.

> I suspect that makes an awful mess.

> Is it that important?

> If you have set the valves hot and running, I would like to hear how
> it went.

> Thanks, Mike Moore

Old recollection,  the lash adjuster threads are 20tpi, 20 threads per
inch.
SO 1 Full Turn is .05 Inch,  1/2 turn = .025 inch,  1/4 turn = .0125
IF My Math is correct

So a base line can be achieved by running till hot then with motor off
rotate by hand to prelim set each at .000 with that cylinders piston is
TDC (top dead center) on the compression stroke, then by turn counting
get close to the CAM stated Specs before trying to get fancy with
altering the lash for that 'That feels faster', or that sounds quieter,
etc. etc.

TDC on the Compression stroke? BOTH valves should have a little play in
the rocker arm, on the exhaust stroke one of those rocker arms will
have NO Play atall. (If I remember rightly)

(specially since we are talking solid lifters)  :-)

Some folks who do this a lot to a certain motor have a spare set of
valve covers that they cut the tops off so they can play without
spraying earl all over while they wrench away on the lash adjust

NOT Recommended for long ram motors :-)

-- 
Paul Holmgren
On account of being a democracy and run by the people,
we are the only nation in the world that has to keep a
government four years, no matter what it does.
     Will Rogers


------------------------------------

To send a message to this group, send an email to:
Chrysler300@xxxxxxxxxxxxxxx

To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or
go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button

For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm

For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/Chrysler300/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/Chrysler300/join
    (Yahoo! ID required)

<*> To change settings via email:
    Chrysler300-digest@xxxxxxxxxxxxxxx 
    Chrysler300-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    Chrysler300-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo Groups is subject to:
    https://info.yahoo.com/legal/us/yahoo/utos/terms/